I just picked it up from the transmission shop. Everything seems back to normal, no binding or thumping on turns. Front wheels had some power to them when tested in the gravel.

They replaced the encoder motor. The old one was stuck in mid-position.

Thanks for the information everyone.

I've done some figure-8's in paved lots, and gravel lots, in forward and reverse. Also mixed in some regular driving. I just dropped it off at a transmission shop this afternoon. They insist that it will only need an encoder motor. I guess I'll find out tomorrow.

When I bought the 2003 AWD Astro 2 years ago, there was a rapid thumping feel on tight turns. I used it this way for several months. I refilled the transfer case with the blue Auto Track fluid, and the problem went away for about a year. Now, on tight slow turns it binds up until one of the rear tir...

Your van - Tell us about your van (pics are even better) Give us the year, model, 2WD or AWD, engine and tranny type and list any mods you may have done. This way if you post a question, someone can just look at your profile to see the basics of your setup and can help you easier. Mods, feel free t...